I know its not an exhaustive list, however it has given me an idea of the type of things to look out for.Cheers!

If a seller is willing to sell Subject To, they've most likely exhausted all other options (that they're aware of) and quite frankly you're doing THEM a favor. 

That can give additional coverage if the the    liability limits of the underlying policy get exhausted. 

The reason I am learning about it is that I have been working 70 hour weeks since 2013 and I am exhausted.

A move-out plan works better than an eviction if the tenant is cooperative and likely to follow-through on their word.

Don't argue, basically apologize; and explain that you had exhausted all other means of locating them, to see f they were interested in selling the property.

If I were to upgrade my water main line and connect directly to it and install a back flow preventer than an additional $5-10k.

It's pretty easy to do yourself or you can pay an incorporator to do it more cheaply than an attorney.

It is way better coverage than an LLC. 

The list of how you can accomplish this is not exhaustive but to name a few includes website marketing in classifieds, social media etc. or paid ones such as gorilla marketing, newspaper, radio etc.